Analog Devices Inc./Maxim Integrated MAX16151AWT+T

Overview

MAX16151AWT+T from Analog Devices is a high-voltage pushbutton on/off controller with integrated switch debouncing, latched 3V output, and one-shot interrupt generation. It accepts noisy mechanical switch inputs up to ±60V, operates from +5V to +36V, consumes ≤15μA standby current, and delivers robust ±10kV HBM ESD protection - designed for reliable power enable control in industrial and portable equipment.

For engineers reviewing the MAX16151AWT+T datasheet, MAX16151AWT+T pinout, MAX16151AWT+T application, or MAX16151AWT+T equivalent, this device serves as a low-power, fault-tolerant system power sequencer with precise 50ms debounce and 8s shutdown timing - critical for battery-powered instruments and harsh-environment controllers requiring clean, latch-based enable signaling.

Technical Context

The MAX16151AWT+T implements an active-low, internally pulled-up PB_IN interface with hysteresis (100mV) and 600µs minimum detection time, enabling noise-immune switch sensing. Its internal 3V regulator powers the active-high push-pull OUT, while the open-drain INT provides a 32ms one-shot pulse on each valid press - extended to 128ms if PB_IN remains low beyond the 8s shutdown period.

This variant (MAX16151A) deasserts the latched OUT when PB_IN is held low ≥8s, supporting controlled system shutdown. The CLR input forces immediate OUT deassertion with 200ns propagation delay and includes 1.6×tINT lockout after OUT assertion to prevent spurious clearing during interrupt generation.

Key Specifications

Pinout & Package

MAX16151AWT+T is packaged in a 1.23mm × 0.83mm, 6-bump wafer-level package (WLP) with bottom-side solder bumps - optimized for space-constrained portable and IoT designs.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar pushbutton on/off controller applications.

Compared with MAX16151AWT+T, MAX16151BWT+T retains latched output during long press - making it unsuitable for hardware shutdown - while TPS3808G33DBVR lacks high-voltage tolerance and integrated timing, requiring additional components to match basic functionality.

Availability

MAX16151AWT+T is available at Aetrix Electronics and suitable for portable instruments, industrial equipment, and telecom shelf management requiring stable component supply, guaranteed RoHS-compliant WLP packaging, and extended temperature support (-40°C to +125°C).

Supply support for MAX16151AWT+T includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Analog Devices is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.

The MAX16151 family is part of Analog Devices' power management portfolio, specifically engineered for robust, low-power system power sequencing in harsh environments - emphasizing high-voltage resilience, ESD immunity, and precise timing control.

FAQ

What is the key functional difference between MAX16151AWT+T and MAX16151BWT+T?

The MAX16151AWT+T deasserts its latched OUT signal when PB_IN is held low for ≥8 seconds (shutdown period), enabling hardware-triggered power-off. In contrast, MAX16151BWT+T maintains OUT assertion regardless of press duration and extends the INT pulse to 128ms without affecting output state - making MAX16151AWT+T the correct choice for applications requiring automatic system disable on long press.

Does MAX16151AWT+T require external components for basic operation?

MAX16151AWT+T requires only a 0.1µF bypass capacitor from VCC to GND for stable operation. No external debounce RC network, level shifters, or ESD protection devices are needed - the IC integrates internal pullup on PB_IN, 3V regulation on OUT, ±10kV HBM ESD protection, and precise timing circuitry, minimizing external BOM count.

Can MAX16151AWT+T drive a load directly, or is it only a control signal generator?

MAX16151AWT+T's OUT pin provides a regulated 3V push-pull output capable of sourcing/sinking up to 1.6mA. It can directly drive light loads (e.g., MCU enable pins, small logic gates) but is primarily intended as a control signal - for higher-current applications, it enables external regulators like LDOs or DC-DC converters, as shown in the typical application circuit.

What is the significance of the "A" suffix in MAX16151AWT+T?

The "A" in MAX16151AWT+T denotes the MAX16151A variant, which implements 50ms debounce time and 8s shutdown period - and critically, deasserts the latched OUT when PB_IN is held low ≥8s. This distinguishes it from MAX16151B (2s/16s, no OUT deassertion) and ensures deterministic hardware-initiated shutdown behavior in safety-critical or battery-conservation applications.

How does the CLR input behave during MAX16151AWT+T operation?

The CLR input on MAX16151AWT+T asynchronously forces OUT low when pulled low, regardless of PB_IN state. However, after OUT assertion, CLR is ignored for a lockout period of 1.6×tINT (≈51ms) to prevent accidental clearing during interrupt generation. If OUT is already low, pulling CLR low has no effect - ensuring predictable, glitch-free control of the latched output.